Stroke-adjusting means in metal-working machinery.



N. B. GHAOE & A. R. MURRAY.

STROKE ADJUSTING MEANS IN METAL WORKING MACHINERY.

APPLICATION FILED AUG. 11, 1909.

966,524. Patented Aug. 9, 1910.

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STROKE ADJUSTING MEANS IN METAL WORKING MACHINERY.

APPLIOATION FILED AUG.11, 1909. 966,524. Patented Aug. 9, 1910.

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, UNITED STATES FATENT OFFICE NORMAN B. CHACE, OF COLLEGE HILL, AND ARISTIDES REYNOLDS MURRAY, 0]

CINCINNATI, OHIO, ASSIGNORS TO THE CINCINNATI SHAPER COMPANY, 01? CIN- CINNATI, OHIO, A CORPORATION OF OHIO.

STROKE-ADJUSTING MEANS IN METAL-WORKING, MACHINERY.

Specification of Letters Patent.

Patented Aug. 9, 1910.

Application filed August 11, 1909. Serial No. 512,344.

To all whom it may concern:

Be it knownthat we, NORMAN B. (linen and Anisrinns REYNOLDS MURRAY, citizens of the United States, residing, respectively, at College Hill and at Cincinnati, in the county of Hamilton and State of Ohio, have jointly invented certain new and useful Improvements in Stroke-Adjusting Means 1n Metal-Working Machinery, of which the following is a specification.

Our invention relates to stroke adjusting means in metal working machinery employing a reciprocating action between the tool and work for performing the cutting operation.

The object of our invention is to provide new and improved means for adjusting the length of stroke of the reciprocating nember, which may be the tool-ram in a shaping or slotting machine or the reciprocating work-supporting table in a crank-planer.

We have exemplified our invention as applied in a shaping machine.

The invention will be readily understood from the-following description and claims, and from the drawings, in which latter:

Figure 1 is a side elevation of our improved device, partly broken away, and partly in vertical longitudinal section on a line corresponding to the line a-z of Fig. 2. Fig. 2 is a vertical cross-section of the same, on the line 31-9 of Fig. 1. Fig. 3 is an'inside end elevation of the crank-arm and crank-gear. Fig. 4 is an enlarged end elevation of the power adjustment for the crank-block, showing the gearing therefor in connected relation, and indicating the operative position of the brake in dotted lines. Fig. 5 is an enlarged axial section of the same on the line w-'w of Fig. 4. Fig. 6 is a similar section of the same showing the clutch in operative relation. Fig. 7 is a detail on the line o-v of Fig. 4, showing the brake in operative relation. Fig. 8 is a detail in vertical section on the line uw of Fig. 5 showing the mounting of the lever. Fig. 9 is a sectional detail showing the positioning-pin for the lever; and, Fig. 10 is a detail showing a modification of the, gearing between the screw-rod for the crankblock and its actuating shaft.

1 represents the column of a shaping machine, on which a tool-ram 2 is reciprocated' for causing the tool 3 thereon to move back and forth across the work supported on the table 4. The tool-ram 2 is exemplified as the reciprocating member for accomplishing relative reciprocation between the tool and work for accomplishing the cutting operation. A crank-block 5 has operative connection with the reciprocating member for reciprocating the same. This operative connection is shown as a rockerrarm 6 pivoted on a shaft 7 to the column, the upper end ofthe rocker-arm being forked, as shown at 8, the'tines of the fork being provided with slots 9 encompassing anti-friction rolls 10 on pins 11 of a positioningblock 12 clamped at suitable points lengthwise of the ram by a clamp 13 for determining the position of the stroke of the ram, the positioning-block being adjusted by a screw 14 having threaded connection therewith.

15 is a crank-arm which is shown integral with a crank-gear 16, the term crank-arm being used in its broadest sense and intended to cover any equivalent thereof. The crankarm is provided with a slideway 17 for the crank-block 5 which has thereon the crankpin 19 journaled in a slide-block 20 having reciprocation in the slideway 21 of the rocker-arm.

22 is a screw-rod having threaded con- 7 nection 23 with the crank-block and journaled against endwise movement in the bean ing 2% of the crank-arm. Rotation is imparted to the crank-gear 16 by a pinion 2:") on a' shaft 26 driven by a pulley 27, although other driving mechanism may also be employed. I

The crank-gear 16 is provided with an elongated hub 31 journaled in an elongated bearing 32 in the column, and encompasses a shaft 33 which is journaled in said elongated hub. The screw-rod 22 has a bevelgear 35 thereon which is operated from the shaft 33and which forms a planetary gear with relation to said shaft. The operative connection between the shaft 33 and gear may be accomplished by a gear 36 at the inner end of said shaft which meshes with a gear 37 journaled on a stud 38 secured to the screw-rod, as shown in Fig. 10, the bevelgear forming the planetary gear.

' 41 is a gear which is secured to the outer end of the hub of the crank-gear 16.

42 is a gear on the outer end of the shaft 33 and is shown as a frictionear havmg splined connection 43 with sai shaft for permitting endwise sliding of said gear on said shaft While causing snnultaneous rota-' tion of said 'gear and shaft. There is a clutch 44 between gear 42 and gear 16 which.

is normally in engagement for causing simultaneous rotation of said gear 16 and shaft 33 during the cutting operation of the machine. One of the members of said clutch is shown secured to the outer end of the hubof the crank-gear, as through intervention of a collarsecured to said hub, the said clutch-member being in turn secured to said collar. The other member of said clutch is on the gear 42. The said clutch is normally held in engagement by a spring 45 in a cap 46 having threaded connection 47 with shaft 33 for adjustin the tension of said sprin the said spring being located between sai cap and gear 42 for normally urging said gear inwardly and causing engagement between the faces of said clutch. The shaft 33 may also have a seat 48 for a suitable;manually-operated wrench.

51 is a lever which has a bearing 52 eccen-4 vgear 57 being shown as a friction-gear arranged to engage the friction gear 42. The

- lever 51 has a brake 58 thereon, also adapted to engage the friction-gear 42. The mating frictionears 42 57 have annular mating sloping aces 59 60, and the brake 58 has a similar mating face 61 adapted to engage the face 59 on gear 42. The sloping face of gear 42 is normally in unmatlng relation endwise with the slopin faces of gear 57 and brake 58, the clutchace ,of said gear 42 bein normally in engagement with the clutc -face on the hub of gear 16. (See Fig. 6). The sloping faces on gear 57 and brake 58 are also normally out of operative engagement with the sloping face of the gear 42, the operative engagement in the form shown beingc'aused by approach of gear 57 or brake 58 toward the rotary axis of gear 42. r

Describing the operation of our improved device, if it is desired to adjust the position of the crank-block 5 in one direction lengthwise of its guideway on the crank-arm, for adjusting the length of stroke of the reciproon shaft 33, thereby releasing the clutch 44.

The relative sizes of the gears 41 56 57 42 are such that upon ap roach between the gears 57 and 42 an acce erated rotation will be impartedto the shaft 33 with relation to the speed of rotation, of the crank-gear 16 for rotating thescrew-rod 22 in one direction, it being understood that the crank-gear remains in rotation during the adjustment of the crank-block. When the crank-block has been adjusted to proper position for imparting the proper length of stroke to the ram, the lever 51 is brought back into neutral or idle position, when the sprin 45 will cause engagement in the clutch 44 for again causing the gear 16 and shaft 33 to rotate in unison. The lever is held in neutral position by a spring-pressed pin 63 slidable in a bearing 64 in the gear-casing and en aging a positioning-notch 65 in the lever. f it is desired to adjust said crank-block in the opposite direction lengthwise of its guideway on the crank-arm, the lever 51 is shifted in the opposite direction for causing engagement between the brake 58 and the gear 42, the sloping engagin face of the brake also causing endwise shi ing-of the gear 42 for disengaging the clutch 44.

As long as the brake is in operative engagement with the gear 42, the shaft 33 will be retarded or brought to a position of rest, when the planetary gear will revolve about the shaft 33, the crank-gear 16 meanwhile 105 continuing its rotations, whereby the screwrod 22 is rotated in the opposite'direction for shifting the crank-block on its crank-arm and reversely adjusting the stroke of the reciprocating member, When the desired 110 length of stroke is obtained, the lever 51 is again brought to normal or inoperative position.

Having thus fully describ'edour invention, What we claim as new and desire to se- 115 cure by Letters Patent is: I

1.. In stroke adjusting means in metal working machinery, the combination with a reciprocating member of the character mentioned, means for reciprocating said reciprocating member comprising a crank-block, a support therefor, and rotating means for said support, of a shaft havin operative effect for positioning said cranklock on its support, a clutch normally operative between said shaft and rotating means, earing between said rotating means and s aft, braking means for said shaft, and means causing operative connection in said gearing or in said braking means and simultaneous release of said clutch for movingsaid crankblock in opposite directions on its support, for the purpose specified.

working machinery, the combination of a reciprocating member of the character 'men tioned, a crank-block having operative connection with said reciprocating member for reciprocating the same, a crank-arm for said crank-block, gearing for 'said crank-arm, a screw-rod for adjusting said crank-block on said crank-arm, a shaft, gearing comprising a planetary gear between said shaft and screw-rod, gearing between said first-named gearing and said shaft for rotating said shaft in one direction and retarding means operating in opposite direction on said shaft for effecting movements of said crank-block in reverse directions on said crank-arm, and a clutch normally in operative relation between said crank-arm and shaft, for the purpose described.

3. In stroke adjusting means in metal working machinery, the combination of a reciprocating member of the character mentioned, a crank-block having operative connection with said reciprocating member for reciprocating the same, a crank-arm, a gear for operating the same, a screw-rod having connection with said crank-block, a shaft having coincident rotary-axis with said gear, gearing embracing a planetary gear between said shaft and screw-rod, a gear-train between said first-named gear and shaft for rotating said shaft faster than said firstnamed gear, a clutch normally in operative relation between said first-named gear and shaft, means for causing operative connection and disconnection in said gear-train, said last-named means affecting the normal relation in said clutch for releasing said clutch upon operative connection in said gear-train, and means for retarding said shaft with relation to the rotation of said first-named gear and releasing said clutch, constructed and arranged for adjusting said crank-block on said crank-arm.

4. In stroke adjusting means in metal working machinery, the combination of a reciprocating member of the character mentioned, a crank-block having operative connection with said reciprocating member, a screw-rod therefor, a crank-arm, gear and shaft having coincident rotary axes, gearing embracin a planetary gear between said shaft ant screw-rod, gearing between said first-named gear and shaft and retarding means for said shaft for causing relative accelerated or retarded motion between said first-named gear and shaft, and means for clutching said shaft to said first-named gear, for the purpose described.

5. In stroke adjusting means in metal working machiner the combination of a reciprocating mem er of the character mennection with said reciprocating member, a

j v crank-arm, gear andshaft having coincident 2. In stroke ad usting means 1n metal reciprocating member of the character HIGH",

tioned, means for reciprocating said reciproeating member embracing a crank-block and,

gear, and means for adjusting said crankblock embracing a shaft, gearing embracing a planetary gear between said. shaft and crank-block, a lever, a brake and gearing 011 said lever, gears for said last-named gearing on'said first-named gear and shaft, a clutch between said first-named gear and lastnamed gear on said shaft, there being contact-faces between said brake and said lastnamed gear on said shaft and between said gearing on said lever and said last-named gear on said shaft causing disengagement of said clutch upon operative engagement of said brake or said gearing on said lever with said last-named gear on said shaft, substantially as described.

7. In stroke adjusting means in metal working machinery, the combination of a reciprocating member of the character mentioned and means for reciprocating said reciprocating member embracing a driving gear and an adjusting shaft having coincident rotary axes, a friction-gear having endwi'se-sliding rotative connection with said shaft, a clutch normally operative between said friction-gear and first-named gear, a lever, a second friction-gear and a brake mounted on said lever, said frictiongears and brake having annularly-sloping mating faces, the sloping face of said friction-gear on said shaft being normally in unmating relation with the sloping face of said second friction-gear and brake and brought into mating relation therewith by engagement therewith by said second friction-gear or brake for releasing said clutch, substantially as described.

8. In stroke adjusting means in metal working machinery, the combination with a reciprocating member of the character described, and means for reciprocating said reciprocating member comprising a crankblock, a support therefor, and rotatingmeans for said support, of a shaft having operative effect for positioning said crank-block on its support, a gear operated by said rotating means, a gear for said shaft, a lever, a brake names hereto in the presence of two subthereon or said second-named gear, and scribing witnesses. gearing eooentrically mounted about the pivot of said lever and brought into and 5 out of operative engagement with said firstnamed gears by the swinging of said lever, Witnesses: substantially as described. L. W. ANDERSON, In testimony whereof, we have signed our W. J. Fos'rmz.

NORMAN BI CHLOE. ARISTIDES REYNOLDS MURRAY. 

